Table 4. Association between steroid use by asthma patients and the number of visits to the emergency room.

Emergency visit	Steroid use		Total	P-value
	Yes	No
One visit	39	146	185	P = 0.000* (p < 0.05)
	21.1%	78.9%	100%
Two visits	18	45	63
	28.6%	71.4%	100%
Three visits	17	15	32
	53.1%	46.9%	100%
More than three visits	49	34	83
	59.0%	41.0%	100%
Total	123	240	363
	33.9%	66.1%	100%